Kurtz-Fernhout Software

Date: Thu, 19 Oct 2000 08:48:03 -0400

From:   Paul Fernhout
Reply-To: unrev-II@egroups.com
Organization: Kurtz-Fernhout Software

To:     unrev-II@egroups.com

Subject:   Architectural Snag

Eric Armstrong wrote [in a letter on October 18, 2000...]

Some possiblities for resolving the dilemma include:

Moving in that direction would be my first choice.

But that's somewhat like the way the Pointrel Data Repository System is set up, so I am biased. For example, the Pointrel Data Repository System has one type of object -- a node which can link up to three things, and which for efficiency can also include a binary string.

Then one builds more complex systems on top of this sort of infrastructure.

Versioning is handled in various ways -- one is simply a list of versions attached to a node representing the abstraction. The sample included with the Squeak version of the Pointrel Data Repository System includes a versioning system for hierarchical tree data.

One has to accept that the architecture will change over time. It is better to have a flexible substrate.

Yes adhoc programming errors will happen. They can be also be fixed in an adhoc way, or by rolling back the repoitory, or by cloning it.


Paul Fernhout
Kurtz-Fernhout Software

Developers of custom software and educational simulations
Creators of the Garden with Insight(TM) garden simulator